I bet Picard screwed up. The destruction of Romulus led to a moment in the Enterprise where he froze, a la Shinzon and Data. Because of this, and the fact it was public, unlike Nemesis, he retires, as Captain, retreats to lick his wounds, thinking about the lives lost and the lives he could've saved, if he hadn't hesitated. Starfleet asks him to return to the Academy to train new officers. It reissues the Wolf 359 damage (people killed by Picard's decisions), losing Data, and his human frailty. Picard, a man of ambition and high standards, has no one to turn to this time. So, he soul searches alone, something that has never done him well. He needs Guinan or Troi, but being deeply private, part of why he sucks at introspection, I think he just quits and hides, this time Lewis, and the Sea, win.